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<dt id="sleep-EXPR"><a class="permalink" href="sleep.html#sleep-EXPR">#</a><a id="sleep1"></a>sleep EXPR  </dt>
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<p>Causes the script to sleep for (integer) EXPR seconds, or forever if no argument is given. Returns the integer number of seconds actually slept.</p>

<p>EXPR should be a positive integer. If called with a negative integer, <a href="sleep.html"><code>sleep</code></a> does not sleep but instead emits a warning, sets $! (<code>errno</code>), and returns zero.</p>

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